series. Find a. the total impedance b. the total current c. phase
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Given V T = 100V∠0 , Z 1 = 1000 + j1500 Ω, Z 2 = 3700 + j0 Ω, and Z 3 = 2000 – j1000 Ω, all
connected in series. Find
a. the total impedance
b. the total current
c. phase angle of the circuit
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- A 220 Ω resistor is in series with an 80 mH inductor. The AC source is 48 at 1 kHz. The power factor is ________. Hint: Draw the circuit and get Vs and IsFor the series circuits of the figure below, calculate the total impedance (ZT). R1 4 k2 XL1=4 k2 ZT Xei= 6 k2 Xc2= 3 k2 XL2= 4 k2 Z7= 17.4 kn, the angle is 76.7° Ob. Z7= 17.4 kn, the angle is 56.3° .Oc. Z7= 4.1 kn the angle is -14° Od. Z7= 7.2 kn the angle is 56.3°Three impedances, Z1 =10020.Q, Z2 =63.2518.43.2 and Z3 =1002-90•Q are connected in star. Convert the star to an equivalent delta connection. And draw the star network and also the equivalent of delta connection
- 2. Two transformes A and B of ratings 5uokVA and 25okVA. Supplying a load kVA of 750 ato.8Pf lagging. open circunt valtajes are 400V and 410v respectively. Trusfarmn A has 1/ nsistance and 5/ ractance and traugformer B hay 1.$, mesistona and 41 reactance. Find (^) Crossacarent in the seandaries on no.load.ib) the load shared by euch transfarmer Their are4- A Circuit of zero lagging power factor behaves as a. A capacitive circuit b. An inductive circuit c. RC circuit d. RL circuitDesian aproblem for wye delta transform adions Determinc the eauivalend resistance between the terminals A andA B.
- For the combined series-parallel RLC-circuit shown in Figure 7, answer the following questions and show your steps in details knowing that the value of B is 3. A Z,2 u J251Q J251Q | Zc -J398Q ZR 10 20° Vs (100+20ß )N Figure 7 A. The total Impedance (Z) seen by the source. B. The phase angle. C. The total current I. Is it lagging or leading? D. The current passing L2 using current divider. E. The voltage dropped across R using ohm's law. F. The current passing C using current divider. G. Verify KCL on node AThree Impedances each of (9 - j18)N are connected in mesh across a three-phase 415V ac supply. Determine the phase current, line current, active power, reactive power drawn from supply. Also draw the Phasor diagram for the mesh connection and marks the Line current ,phase current line voltage and phase angle between phase current and pahse voltage. phase current (Ip) Line current real power reactive powerImpedances are marked in perunit on a 100MVA, 100 KV base. The load at bus 2 is S2= 16MW - 32 MVAR, and the load at bus 3 is 50MVA at 0.8 pf leading. It is required to hold the voltage at bus 3 at 100 KV. V V2 V3 j0.4 pu j0.5 pu 87.32 < 13.24 KV 69.55 < 34.88" KV 139.59 < 18" KV S2 Sa 108.95 <11.768" KV None of these 101.284 < 17.49 KV nce, the voltage at bus 2 is V2D * and the voltage at bus 1 is V1= 228 AM 4/14/2021
- A certain industrial load has an impedance of 0.6 angle 30 ohms at a frequency of 60 Hz. What capacitorconnected in parallel with this load causes the angle of the total impedance to decrease to 15º ? Also if the load voltage is 120 V, what is the decrease in line current produced by adding the capacitor ?Question 6 20020°V L rms In the circuit in the figure; L load draws 15 kVA with lagging power factor 0.6. • The load L 2 draws 6 kVA with a leading power factor of 0.8. According to this; What is the value of the reactive power for the loadL ? 1 9000 O -3600 O 2700 O 12000 O 4800 O 4500 No new data has been saved. The latest contact is at16I01ANSWER THE FOLLOWING PROBLEM: MAKE SURE TO SHOW YOUR COMPLETE SOLUTION AND ANSWER MUST BE IN FOUR DECIMAL PLACES. 5. Three impedances Za,Zc & Zr are connected in parallel. If at 60 Hz, Za=0+j8, Zc=0-j2 and Zr=5+j0 Ohms. Solve for the resultant power factor.